Hydraulic brake



p 1943 G. R. NEVILLE 2,330,004

HYDRAULIC BRAKE Filed Oct. 25, 1941 2 Sheets-Sheet l Inventor A Name p 1943- G. R. N EVILLE 2,330,004

HYDRAULIC BRAKE Filed Oct. 23, 1941 2 Sheets-Sheet 2 A? V T I Ifi I u U612 tar Patented Sept. 21, 1943 UNITED STATES PATENT OFFICE HYDRAULIC BRAKE Gerald R. Neville, Syracuse, N. Y.

Application October 23, 1941, Serial No. 416,264

1 Claim. lee-19.5

This invention relates to hydraulic vehicle wheel brakes, and an object of the present invention is to provide a brake of this character so equipped as to facilitate the adjustment of the shoes of the brake as wear on the brake linings occurs.

Further itis an object of the invention to provide an improved hydraulic vehicle wheel brake equipped with means to. facilitate manual adjustment of the brake shoes to compensate for wear; and at the same time tov provide such a wheel brake as will have many advantages over the generally known types of hydraulic wheel brakes.

Among such advantages may be mentioned that the brake of the present invention is such as will accurately distribute the pressure of the shoes against the drum under all conditions; the life of the brake lining will be extended; squeaking and chatter eliminated; will have smooth braking action; and be economical.

The invention together with its objects and advantages will be best understood from a study of the following description taken in connection with the accompanying drawings wherein:

Figure 1 is a sectional view through the drum of an hydraulic vehicle wheel brake illustrating my invention as applied thereto.

Figure 2 is an enlarged detail elevational view showing an adjusting cam associated with a brake shoe in accordance with the present invention.

Figure 3 is a detail sectional view taken substantially on the line 3-3 of Figure 1.

Figure 4 is a detail sectional view taken substantially on the line 4-4 of Figure 1. a

Figure 5 is a sectional view through one of the cylinders of the brake, and

Figure 6 is a perspective view of a guide lug forming part of the invention.

Referring more in detail to the drawings it will be seen that 5 indicates generally a conventional hydraulic brake drum, fragmentarily shown in the drawings, while 6 indicates the stationary cover plate.

The brake shoes are indicated by the reference numeral l'| and, as conventional, are connected at their confronting ends through the medium of coil springs 8-8 that serve to return the shoes to releasedposition.

The reference numerals 99 indicate the hydraulic cylinders in which operate the brake expanding pistons Ill-ill.

and of the type that have the free ends thereof bifurcated as at l2 to straddle and engage the integral abutment lugs l3-I3 provided on the webs of the respective brake shoes I.

In accordance with the present invention the shoes I, respectively, are provided adjacent the ends thereof with guide slots l8 that preferably have rounded ends and accommodate guide studs [5.

As shown to advantage in Figure 4 each stud l5 has an end l6 fitted within an opening I! provided therefor in the plate 6 and secured within the opening through the medium of a shoulder it formed on the stud i5 and a stud bolt l9 that threads into an axial socket 2|] provided therefor in the mentioned end of the stud The other end of the stud I5 is accommodated within the guide slot l4, and at said end the stud i5 is provided with a shoulder 2| between which, and the head of a stud bolt 22, the slotted portion of the web of the brake shoe is accommodated as shown in Figure 4.

The stud bolt 22 is threaded in an axial socket 23 provided therefor in the last-named end of the guide stud I5. I

Further in accordance with the present invention means is provided to facilitate manual adjustment of the shoes 1 as wearoccurs on the brake linings 24.

Such shoe-adjusting means embodies, for each shoe 1, an adjusting cam 24 that is provided in its periphery with a groove 25 that accommodates the edges of a substantially D-shaped opening 26 provided therefor in the web of a brake shoe 1.

The cam 24 is divided into two sections, 24a, 24b, that are secured together and to one end of a stud 21 through the medium of a stud bolt 28 as shown to advantage in Figure 3.

The stud 21 has an end thereof accommodated within an opening 29 provided therefor in the plate 8, and at said end is threaded to accommodate a lock nut 30 between which and the plate 6 is interposed a washer 3 I.

At the extremity of its threaded end the stud 21 is provided with a kerf or slot 32 to facilitate the application thereto of a suitable tool for.

as the stud 21 is rotated. the pezifliihery of the cam' bearing against the simaightmifigflfifl of the opena ing 26 will cause the-awe 5| iimsiil'ifitiib Position- It will thus be seian thatliinm qmick, eillcient manner an adjustment Milllnafiimes I can be eflected to compensate for iiihe brake linings, and that such adinainmitszan .be effected without dismantling a The advantage justmemiinpnii, *ltogether with the advantages herei'mibouelmierated will, it is believed, be fully app mibyithose skilled in the art, as will alsaiilben and operation of the brake t features of the present invention, vim'fiimther detailed description.

It is also to be ithe embodiment of the inventionias imminflllustrated, and described, is but illustrative. walla-m aware that in practical fields the details if (construction may necessitate alterations 1'alling the scope of what is claimed.

Having thus described the invention what is claimed as new is:

In a vehicular ,wheel brake of the hydraulic type, a'fixed brake plate, and shittable brake shoes, and means for manually adjusting said shoes to compensate for wear of the brake linings, said means embodying, for each shoe, a stud rotatably mounted on said plate and having means at one end for rotating the stud, a cam, a bolt eccentrically threaded through the cam and into an opposite end or the stud for rotation of the camwith the stud, a flange on one end of the cam and a washer secured on the other end 01 the cam by said bolt and cooperating with the said cam is. fitted to operate for transmitting shifting movements to the shoe.

' GERALD R. NEVILLE. 

